The obstructed view of the abandoned construction site isn't the best, neither is the local neighbourhood of host clubs. However, skip past this and your right in the middle of Dotonbori.
Not particularly close to the train lines, so be prepared to schlep your luggage a for a short while through some of the most crowded parts of Osaka

Pocket Guide: Osaka Namba Hotels

This area contains the covered shopping arcade Jan Jan Yokocho, named after the “jan jan” sound of the stringed instruments waitresses traditionally played to attract customers to their restaurants. Originally frequented by blue-collar workers during the 1950s, it remains a destination for down-to-earth nostalgic dining. Also nearby is Tsutenkaku Tower. Considered by residents to be the symbol of modern Osaka, the tower’s observation platform offers city views from 91 meters above the street.